Chain guard for narrow-ware looms



June 24, 1930.

F..y a. HoLMEs CHAIN GUARD FOR NARROW WARE LOOMS Filed Sept. 12, 1929 'ATTUH/VEY Patented June 24, 1930 ELBRIDGE R. HOLMES, or WORCESTER,MASSACHUSETTS,,Assrenort To oRoMPToN e;

lmrowLEs LooM Woitxs, ornwononsrnit;

MASSACHUSETTS rlhis invention relates to improvementsin chain guardsAforlthe shuttle motions of nar-4 row ware looms and it is the generalobject of the invention to provide a guard so constructed as topermitthe use ofvarying lengths of lays and also to accommodate lays ofdiiferent heights.

In lcertain types of narrow ware looms the rack rod whichmovestheshuttle actuating pinions is drivenl by a4 chain, andit isdesirable to protect theweaver at the point-s Where .the chain` meetsits sprockets. o Depending upon t-he length of the shuttle employed thelaywill extend more or less beyond the loomside and it; is an-.importantobject of my present invention to `provide a telescoping guardwhich isextensible to provide for varyingA amounts of overhang of the lay. y`Under some conditions it is desirable to aise or lower the laydepending upon the character of the cloth being woven, the lowersprocket for the chain remaining in fixed position, and it is a stillfurther object of my present invention to provide for these adjustmentsby em loying an extensible guard.

Vith these anc other objects in view which will appear as thedescription proceeds, my rinvention resides in the combination and argrangement of parts hereinafter described and `set forth in the claims.`

In the accompanying drawings wherein a convenient embodiment of myinvention is set forth, Y v y Fig. 1 is a front elevation of one endA ofa loom having my-invention applied thereto, certain parts beinginsection, 1 r

Fig. 2 Vis a vertical section Von line 2&2 of Fig. 1 lookingin thedirection of the arrows, 1 v Fig. 3 is a vertical section `on line 3-3of Fig. 2, the chain and sprocketstherefor being indicated in dot anddash lines,

Fig. 4 is an enlarged detail end elevation looking in the directionofvarrow 4:,Fig. 1, Fig. 5 is a horizontal section on angenlarged scaleon line 5 5 of Fig. `3, A

Fig. 6 is an end elevation looking -in the direction of arrow 6, Fig. lshowing the 32 bolted-to a metallic .11.

MAssACHUsET'rs, A oonro-1ar1'rion,olil

CHAIN GUARD Foa Nannonna/"AREv Looms`v Application filed. September 12,:1.929. `Serial 1Y0/392,225.

manner, of supporting the Vlower end of the laysw'ord, and Fig. 7 is aldetail top plan yview taken in the direction of arrow7, Figcl. E YVReferring to Fig. 1, I have shown the loomsidel() and a lay ll'vvhichis mounted on swords one of which is indicated atI l2. The llay swordhas a lug 13 as shown in Fig. 6throughwhich is vertically threaded astopbolt 14. The head of the latter engages the top of a foot 15 whichis mounted on a hollow rocker shaft 1,6. Bolts 17 passingthrough slots18 holdv thesword 12 to the foot 15and by loosening the, bolt 17 andvarying` the position of the bolt `14 the vertical locationof-the lay'may be varied; The rocker shaft 16 moves'in a bearinglt) which isfixedtothe loomframe.-

A rackf20is slidable longitudinally 'in` a slot 2lfin the upper surfaceof the lay, and meshes 'with y pinions 22 which operate through devicesnot shown to cause reciprocation of theshuttles not shown. A chain 23 islattached to the rack and passes around a sprocket 24 `mountedforrotation on ay stud k.25,fixed with respect Ito the lay. The chain`extends downwardly and around .a sprocket 26 which ymoves. freelyarounda fixed stud .27. -The chainpasses 'through the hollow vshaft 16 andisconnected to an actuating rod 28.. .The `stud 27 1is carried by aforked bearingfmember 29Ywhich is held in adj usted angular andlongitudinal position' on the hollOWrShaft by aclamp nut 30. -1

v 1n similarmannerl the stud-25 is held by a bracket31 which is forkedand has a root section 33 ofthe lay During operation ofthe loom the laymoves back Vand forth aroundthe 4axis of the shaft 16as .a pivot by-amechanismV not shown,

and the rack bar20 Ireciprocates,moving the shuttles iirst in one'direction-through the shed'of the web and thenv in the opposite 9 fardescribed is of common construction,

being substantially the same as that set forth The bracketcan assumedifferent positions transversely of the lay.

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in my prior Patent No. 1,462,549 to which reference may be had for amore complete understanding of the shuttle motion. For the purposes ofthe present description it is sufficient, it is believed, to set forthone sprocket on the stud 27, although in practice l may employ more thanone.

My present invention aims to provide a guard vor protector for the chainwhich operates the shuttle rack, and in carrying my 1nvention intoeffect I secure a small stand to the metallic section 33 of the lay bymeans of a bolt 41 which extends through a slot 42 lying transversely ofthe lay. A pivot pin 43 carried by the stand 40 passes through the sideplate 44 of an upper shield member 45 which is substantially U-shaped inhorizontal cross section, as shown in Fig. 5. The member 45 is,therefore, pivotally mounted with respect to the lay and can swing toassume any one of a number of positions under the lay.

The lower part or member of the guard is formed of a pair ofsubstantially similar elements 46 and 47 which, as viewed in Fig. 2,

lie respectively-to the right and left of the chain sprocket 26. Eachmember has at the upturned end thereof an ear 48 through which passes aclamping bolt 49 held in position by a nut 50. As shown particularly inFig. 5 each element is provided with a substantially vertical wall 51and a side plate 52 which has near the upper end thereof a shortretaining rib 53. The distance between the v wall 51 and the rib 53'issubstantially the same as the width of one of the Walls 44 of the shieldmember 45. The elements 46 and 47 are made of opposite hand so that whenassembled with their upper ends held together by means of the bolt 49the side plates 52 will be clamped against the walls 44 and the lowerportion of the shield member will be held in position by the ribs 53.

The lower part of each of the members 46 vand 47 is bell-shaped asindicated at 54 to provide a hollow chamber for the sprocket 26 or anyother sprockets which may be necessary. Each bell ispro'vided with asubstantially cylindrical shell 55 one portion of which is broken awayVor notchedas at 56 to provide room for the entry of the stand 29. rlhepivot kpin 27 extends through hubs 57 and 58 formed, respectively, onthe members 46 and 47 said pin being held in position bymeans of setscrews 59. Certain portions of the cylindrical shells 55V abut eachother so as to hold the substantially vertical webs 60 of the two bellsin spaced relation. This construction is set forth clearly in Fig. 2 andis maintained by the set screwsl 59 which are set tightly against thepin V27 Y By referring to Fig. 3 it will be seen that the right or upperend of the notch 56 as designated at 61 is spaced above the adjaner thelower left end of the notch 62 is below the adjacent portion of thestand, thereby permitting the bells to move through a limited angularadjustment with respect to the stand 29. y

It is believed that the manner of assembly will be understood from thedescription already given, the shielding member 45 being first placed onits pivot pin and' then the two elements 46 and 47 being fitted aroundopposite sides of the member 45. Each bell is slipped .over its end ofthe pin 27, thereby rendering it unnecessary to remove the sprocket 26from its operat-ing position. The nut 50 and bolt 49 serve to clamp theintermediate parts of the guard in fixed position and as previouslydescribed the set screws 59 will position the lower part of the guard.

I have shown a loom wherein the lay extends somewhat beyond the verticalline passing through the pivot pin 27, but it not infrequently occursthat the lay'will be of shorter length than that set forth herein, or itmay be longer, in which ease the same parts of the guard as set'forthcan be employed but their relation with respect to each other will besomewhat different, the shielding member 45 moving down along theupright side plates 52 and also Vtaking a different angular positionwith respect to the lay when the latter is short, and a correspondinglyopposite relation will exist if the lay is longer than that shown inFig. 1.

In certain other types of looms wherein the lay is desired to be at aposition somewhat higher with respect to the pivot pin 16 than thatshown in Fig. 1, a similar adjustment will be made, the bolt 49 and nut50 permitting an extension of the telescoping members of the guard andthe upper and lower members of the guard moving freely about their pivotpins 43 and 27, respectively. 'here the guard is to 'be adapted to aloom requiring a considerable angular movement of the bells from thepositionshown in Fig. 3 the ends 61 or62, as the case may be, can be'cutaway so as not to interfere ywith the stand 29. A f

From the foregoing it will be seen that 1 have provided a simple form oftelescoping chain guard for a narrowware loom Wherein two' parts areemployed, one telescoping in the other, each part being supported forfree pivotal movement about one of the already existing portions of theloom; Itwill be seen that a guard constructed as set forth herein can beused on a variety of narrow ware looms which have lays of differentlengths and also heights above the rocker shaft 16. Furthermore, themeans for pivotally supporting the lower portion of the guard also actas a mounting for the sprocket 26. Also, with certain types of narrowware 65 cent portion ofthe stand 29, and in like man-looms, the locationof the rack rod 20 transversely of the lay assumes different positionsso that the chain and the upper sprocket 24 will assume spect to thefront of the lay, and in order to keep the guard central with respect tothe chain an adjustment is made by means of the bolt 4l and slot 42which extends transversely of the lay.

1 I-Ia ving thus described my invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

l. A guard for a narrow ware loom havi g a lay and a rocker shaftbetween which extends a shuttle driving rack operating member, a pair oftelescoping members, one pivotally mounted with respect to the lay, andthe other pivotally mounted with respect to the rocker shaft and havingportions to lie around the rack rod operating member. 2. A guard for anarrow ware loom having a lay and a rocker shaft between which extends ashuttle driving rack operating member, a pair of telescoping members,one pivotally mounted with respect to the lay, and the other pivotallymounted with respect to the rocker shaft and having portions to liearound the rack rod operating member, and clamping means to hold themembers together. Y

3. A guard for a narrow ware loom having a lay and a` rocker shaftbetween which extends a rack operating member, a guard comprising upperand lower telescoping memers, one member being pivotallymounted withrespect to the lay, and the other memer comprising two elements eachpivotally mounted with respect to the rocker shaft and means to clampsaid elements to the upper member.

4, A guard for a narrow ware loom having a lay and a rocker shaftbetween which extends a rack operating member, a guard member pivotallymounted to the lay, a pair of guard elements one located on one side andthe other located on the opposite side of the member, a pivotalconnection between said elements and th e rocker shaft, and means tohold said member and elements together.

5. A guard for a narrow ware loom having a lay and a rocker shaftbetween which extends a rack operating member` a guard member pivotallymounted to the lay, said member being substantially U-shaped inhorizontal cross section, and a pair of guard forming elements vlocatedon opposite sides of the member and having telescoping relation withrespect to the latter, and clamping means to hold said elements againstthe member, the lower portion of the elements being different positionswith re-- tends, a pairof telescoping guard'members, V

one pivotally mounted with respect to the lay andthe `other pivotallymounted around the axis of the sprocket. Y'

'7; In a guard for a narrow ware loom having a lay and a rocker shaftwith a sprocket supported with respect to the shaft and around which arack operating chain extends,` a pair of telescoping guard members, onepivotally mounted with respect to the lay, and the other pivotallymounted about the axis of the sprocket, said other having a bell shapedportion to receive the sprocket.

8. In a guard for a narrow ware loom having a lay and a rocker shaftwith a sprocket supported -with respect to the shaft and aroundwhich arack operating chain extends, a guard member pivotally mounted to thelay, and a pair 'of guard elements each pivotally mounted about the axisof the sprocket and having a bell-shaped portion, said portions being inalignment to define a chamber for the sprocket, said member andpairofelements having telescoping relation, and means to clamp theelements to the member.v

I 9. In a guard for a narrow ware loom having a lay and a rocker shaftwith a sprocket supported with respect to the shaft' and around which arack operating chain extends,

i a pivot pin for the sprocket, a guard member pivoted to the lay, and apair of guard elements each mounted .on the pin for the sprocket andsecured thereto, the member and elements having telescoping relation,and means to clamp said elements and member together'.

l0. In a guard for a narrow ware loom having al lay and a rocker shaftwith a sprocket supported with respect to the shaft and around which arack operating-chain extends, a pivot pin for the sprocket, a guardmember pivoted to the lay, and a pair of guard elements each mounted onthe pin for the sprocket and secured thereto, the member and elementshaving telescoping relation, and means to clamp said elements and membertogether, the elements having similar but oppositely extendingbell-shaped portions to receive the sprockets.

Y il. A guard for a narrow ware loom having a lay and a rocker shaftbetween which extends a rack operating member, a pair of teleseopingVmembers, one pivotally mounted with respect to the lay, and the otherpivotally mounted with respect to the rocker shaft and having portionsto lie around the rack operating member, and means to vary the pivotalsupport for the upper member relatively to the lay. c

lber mounted on the lay, and

l2. A guard for a narrow ware loom having a. lay and a rocker shaftbetween which extends a rack operatingmember, a pair of teleseopingguard members, one of which is pivotally supported with respect to 'thelrocker shaft, a 'pivotal support for Ithe other member mounted on thelay, and means to hold said pivotal support for the other member in anyone of a plurality of positions relatively to the lay. e

13. A guard for a narrow ware loom having Va lay and a rocker shaftbetween which extends a rack operating member, a pair of teleseopingguard members, one of which is pivotally supported with respect to therocker shaft, a pivotal support for the other memvmeans to hold saidpivotal support Afor the other member in any one of a plurality ofpositions relatively Ato the lay in a direction transverse of `the `la14. A guard for a narrow ware loom having a lay and a rocker shaftbetween which extends a shuttle rack operatingv member, a pair ofteleseoping guard members,` one of saidmembers pivoted to the lay andhaving spaced parallel side walls between which eX- tends an end wallribs formed on the side walls spaced from `and substantially parallel tothe end wall, the

second member being pivotally mounted with respect to the rocker shaftand being 1oeated vbetween the end wall and ribs to be imited in pivotalmovement by the ribs and end wall..

In testimony whereof I have hereunto affixed my signature.

ELBRIDGE B. HOLMES.

to connect said sidewalls,

